Question

4. Match each substance A to E listed below with the appropriate description in parts (i) to (v):

(B) Silver chloride

(i) A non-metal which is a good conductor of electricity

(ii)A covalent compound which behaves like an ionic compound in aqueous solution

(iii)A compound which is insoluble in cold water but soluble in excess of ammonia solution.

(iv) A pink metal which is deposited at the cathode during the electrolysis of the solution of this Salt.

(v) A non-metal which reacts with concentrated nitric acid to form its own acid as one of the product.

Answer 1

Step 1: Explanation for correct option:

The correct option is (iii) A compound that is insoluble in cold water but soluble in excess of ammonia solution. When AgCl reacts with ammonia solution, a diamine silver complex is formed which is readily soluble in ammonia solution. Otherwise, AgCl being a covalent compound is insoluble in cold water. The following reaction is seen:

$$\begin{gathered} {\mathrm{NH}}_3+\mathrm{AgCl}\to \mathrm{Ag}{\left[{\mathrm{NH}}_3\right]}_2\mathrm{Cl}\downarrow \\ \mathrm{Ammonia}\mathrm{Silver}\mathrm{Diamine}\mathrm{silver} \\ \mathrm{Chloride}\mathrm{complex} \end{gathered}$$

Step 2: Explanation for incorrect answers:

1. Since it is not non-metal, options (i) and (v) are incorrect.
2. Since it doesn't behave like an ionic compound but instead goes for complexation, option (ii) is incorrect.
3. Since it is not a metal, option (iv) is also incorrect.

Final answer: Correct option is (iii) A compound that is insoluble in cold water but soluble in excess of ammonia solution.